2031121 has 2 divisors, whose sum is σ = 2031122. Its totient is φ = 2031120.

The previous prime is 2031103. The next prime is 2031137. The reversal of 2031121 is 1211302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1918225 + 112896 = 1385^2 + 336^2 .

It is a cyclic number.

It is not a de Polignac number, because 2031121 - 2¹¹ = 2029073 is a prime.

It is a Chen prime.

It is a pancake number, because a pancake can be divided into 2031121 parts by 2015 straight cuts.

It is a junction number, because it is equal to n+sod(n) for n = 2031098 and 2031107.

It is not a weakly prime, because it can be changed into another prime (31121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1015560 + 1015561.

It is an arithmetic number, because the mean of its divisors is an integer number (1015561).

2^2031121 is an apocalyptic number.

It is an amenable number.

2031121 is a deficient number, since it is larger than the sum of its proper divisors (1).

2031121 is an equidigital number, since it uses as much as digits as its factorization.

2031121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 2031121 is about 1425.1740244616. The cubic root of 2031121 is about 126.6422444451.

Adding to 2031121 its reverse (1211302), we get a palindrome (3242423).

The spelling of 2031121 in words is "two million, thirty-one thousand, one hundred twenty-one".